Most email systems have some mechanism for blocking connections based on
this kind of blacklist.

Hope this helps,
_M
--
Pete McNeil
Chief Scientist
ARM Research Labs, LLC
www.armresearch.com
866-770-1044 x7010
twitter/codedweller
#############################################################
This message is sent to you because you are subscribed to
the mailing list <sniffer@sortmonster.com>.
This list is for discussing Message Sniffer,
Anti-spam, Anti-Malware, and related email topics.
For More information see http://www.armresearch.com
To unsubscribe, E-mail to: <sniffer-...@sortmonster.com>
To switch to the DIGEST mode, E-mail to <sniffer-dig...@sortmonster.com>
To switch to the INDEX mode, E-mail to <sniffer-in...@sortmonster.com>
Send administrative queries to <sniffer-requ...@sortmonster.com>